You can make or buy a section of louvered door to hang over it.... the frame is thick wood, such as 1x1 and the slats are set into the frame at a downward angle to the outside. It allows the airflow but breaks the straight wind. You could then add an old towel to the inside of it, hung from the top corners to about 2/3 way down, it will further baffle the wind but still allow airflow.
To make them, you can use pieces of old yard sticks for the louvers... that is what I did for a repair on one. Find old yardsticks laying around and cut it to length....